Liquid-soap pump



Oct. 27, 1925 E. G. wA'rRous ILIQUID soAP PUMP Filed April 25. 1918 5 6,617 fair-outs,

liquids Patented Oct. 27, 1925.

UNITED STATE-s PATENT OFFICE. I

EARL G. WATBOUS, 0F CHICAGO, ILLIOIS.

LIQUID-SOAP PUMP.

To all 'whom t may concern.:

Be it known that I, EARL G. VVATRoUs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Liquid-Soap Pumps, of which the following is 4a specification.

This invention relates more particularly to an apparatus for delivering or dispensing measured, or predetermined amounts, of fluids slich as liquid vsoap or other viscous The pump whichA forms the principal feature of this invention is of the displacement type, and is constructed in a novel manner so as to perform such particular operations asl are desirable in pumping liquid soap `or the like.

The objectsof this invention are to provide an Vimproved apparatus for pumping or dispensing liquids; to provide a novel apparatus for dispensing measured quantities of liquid soap; to provide a pump of simple construction which will' be efficient and durable in operation and which .willtend to clean itself evenfw'hen pumping or dispensing viscous liquids;v and in general to provide such an improved apparatus as will be more fully described hereinafter.

In the accompanying drawingsillustrating this invention:

Fig. 1 is a side view of one form of my improved apparatus shown in position above a wash bowl;

Fig. 2 is a longitudinal sectional view of the pump; and,

Fig. 3 is a cross sectional View taken cn the line '3--3 of Fig. 2. v l

Various forms of pumps or valves have heretofore been proposed for use in dispensing liquid soap, but such devices have not generally been satisfactory on account of the peculiar nature of the liquid. If the soap is exposed to the air for any considerable length of time, it is apt to evaporate and leave a more or less solid residue which will frequently plug up or stop the discharge openings and prevent the further operation of the device. In order to avoid these objections, I provide the novel form of pump as shown in the drawings.

As illustrated in these drawings, 4 represents a receptacle or container for liquid soap or the like, which is connected by means of a pipe 5, with the pump 6. The container 4 may be made in any suitable form, and as shown, is supported by a wall bracket 7. A

single receptacle maybe utilized for supplying one pump, or a number of pipes may lead from one receptacle to a plurality of pumps.

The pump proper comprises a cylindrical body or barrel 8'wl1ich is threaded at one end 9 for engagement. with the connecting pipe. The body 8 has a reduced portion or partition 10 adjacent to the inner end which is threaded to receive an adjustable bushing 11 having a hole or passage-way 12 therethrough. This adjustment is employed to compensate for variations in manufacture. The plunger 13' which extends out at the open end of the body, is provided with a detachable handle or push button 14 for operating the same. This plunger has an inwardly extending rod or stem 15 which coacts with the hole 12 and serves as avalve for cutting off the supply from the main chamber 16. The plunger or piston 13 has an .annular projection or collar 17 which terial. This washer is hel'd between the an.

nular flange or projection 19 and a ring 21 which fits closely within the outer portion of the cylinder or barrel 8,-andalso enga'ges closely with the plunger 13. This ring has an inner annular enlargement or opening 22 and an outer circumferential groove or channel 23, thesegrooves being connected by radial holes or openings 24. The ring 21 is v held in position by packing-25 and a gland or bushing 26. The plunger 13 is slightly enlarged at 27 Where it engages with the yielding washer 20, so that this Washer is not apt to be pressed inwardly so as to close the opening 22.

The body or cylinder 8 has a dischargev orifice 28 which is in alinement Awith the groove 23, and preferably with one of the holes 24.

When there is a supplyl of liquid in the container 4, it will fill the' chamber `16 but cannot pass the projection 17 which forms, with the adjacent parts, a complete closure. When the operator presses the handle 14,

and forces the plunger 13 inwardly, the projection or collar 17 and the enlargement 27 are disengaged from their coacting parts and leave a passageway from the chamber 16 through thc opening 22, holes 24,' and groove 23 to the discharge orifice 28. Just before this vpassageway is openedythe stem 15 engages with the hole 12 and closes the opening between the supply pipe and chamber so that there is never a through opcii passage-way from the supply pipe to the discharge orifice. Consequently the operator cannot hold the device open so as to permit a continuous stream to fioiv fron. the receptacle. The further movement of the plunger causes it to enter the chamber 16 and displace the liquid which is forced out throughthe discharge passage-way and orifice. In this manner, a measured supply of liquid isl discharged, depending upon the amount of depression or movement of the plunger. As soon as the plunger-is released, the spring 18 tends to force it back to normal position, but this movement isy accompanied by a novelvfunction of the apparatus. It will be seen that the opening to the supply ipe remains closed until about the end of t e return stroke, lso that as the pluiiger starts on its return, there is a tendency to form a partial vacuum in the chamber 16. Consequently the air will rush in through the discharge orifice and discharge passageway and will thereby force any liquid remaining in said orifice4 or passage-Way back into the chamber. This tends ito clean thc discharge passage-ways and prevent their becoming clogged by evaporation of the volatile portion of the soap. The intake orifice 12 will also be cleaned at each stroke of tbc pump by the action of the pin or stem 15' passing through the same.

It will be seen from the above description that I provide a novel dispensing or pumping apparatus which is particularly applica.-

ble for measuring and discharging soap or the like and which, on account of its selfcleansing functions, isnot apt to becomel clogged. Furthermore, the positive action of the pump Will insure the roper delivery of predetermined amounts o soap or other similar li uid.

It will e observed that changes may be made in the details of construction of this apparatus Without departing from the scopi` lof the present invention, and therefore, I do not wish to limit myself to the exact arrangement'or construction herein shown and described, except as specified in the following claims in which I claim.:

1. In. a liquid dispensing apparatus, the

combination of a pumphaving a body provided with a displacement chamber, a source of supply, a connection from said source of supply to said chamber, a displacement plunger of less diameter 'than the chamber portion vhaving a discharge orifice at the' endof the chamber opposite from the intake, and a closure actuated by the plunger lfor closing the discharge when the plunger is in normal position.

2. In a liquid dispensing apparatus, the combination of a ump having a displacement chamber, an intake at one end of said chamber, a source of supply, a connection from said source'of supply to said intake, said chamber having an inlet aperture, a pin secured to a plunger and coacting-witb the aperture to form a. closure, a displacement plunger coacting with lsaid chamber for forcing the liquid therefrom, said plunger being ofless diameter/than the chamber but of greater diameter than the pin, a discharge at the end of the chamber opposite from the intake, a closure for said discharge, said closuresbeingactuated by the plunger and arranged so that, the discharge closure will beI closed when the plunger is in normal position, the intake closure being closed before the `latter is opened and remaining closed during the' discharge stroke of the plunger and until the discharge closure is again' closed.

3. In a'device of the character set forth,

the combination o f a body having a cliani-A ber therein, an intake orifice at one cnd'cf said chamber, a dis lacement plunger slid- `ably mounted in. said body' and'adapted to be projected into vthe chamber, a handle for said plunger, a spring tending to.v hold said,

plunger'in normal retracted position, a stein on said plunger which 1s of lessv diameter than the plunger and which fits said intake i orifice and is projected into the same when the plunger is pressed inwardly, a discharge opening for said chamber, and means on said plunger for closing the discharge open- Vlimiting the oiitivard movement of said plunger, a spring tending to held said plunger in normal position, and a projection from said plunger adapted to close the intake'hole during the stroke of said plunger.

5..The combination of a body having a chamber therein, an intake orifice at one end of said chamber, a Wall at the opposite end of said chamber 'having an aperture therethrough, a plunger mounted vin said .bodji1 collar and the opposite wall of said chamber Y for yholding said plunger in normal position.

6. In a pump, the combination o a body having a displacement chamber therein, an intake for said chamber, a valve for closing said intake at predetermined times, a plunger mounted in said body and having a collar adjacent toits inner ing an inwardly projecting flange'xvith an opening fitting said collar, a shoulder on said plunger adjacent to thecoLlar, a washer of resilient material mounted in said' body adjacent to said flange and fitting over said shoulder, a ring mounted in said body next to the Washer and having an annular recess fitting over said shoulder and also having "munications from said recess,

an outercircumferential groove with confi-V said body having a discharge orifice communicating with said outer groove, andv a packing for said plgnger fitting in the outer end oi the body.

n a pumpof the character set forth,

the combination of a body having a chamber therein with a relatively small intake orifice 'at one end, a displacement plunger coacting with said chamber and adapted to be withdrawn from said chamber to permit the chamber to be filled, said chamber having a discharge orifice which is closed when the plunger is Withdrawn from the chamber, and a pin on said plunger which fits said intake orifice and closes the same when the plunger is moved into the chamber.

8. .A liquid dispensing member comprising a chamber with an inlet and outlet, a

end, said body hav.

plunger inlet and open the outlet, the portion of the plunger which closes the inlet being 'smaller than the remaining portion.

9. In a soap pump, the combination of a chamber having an inlet and an outlet, a packing washer coacting with the outlet and having a hole therethrough of the saine diaminovable in the chamber to close theeter as the outlet, a displacement plunger coacting with said chamber and fitting `in said outlet, said plunger being somewhat smaller than the hole throughthe 'Washer to provide a discharge passage but having an enlarged portion fitting in said is in closed position,

said plunger also havhole when the plunger ing a collar orI projection for engagement with the face of the Washer.

10. In a soap dispenserthe combination of a chamber having an 'inlet and an outlet, a packing washer coacting With the outletvand having a hole therethrough of the saine diameter as the outlet, a displacement plungei` coacting with said chamber and fitting -in said outlet, said plunger embodying a cylindrical portion which fits the hole in thel washer and a flange on the cylindrical poi'- tion adapted for engagement With the face of the Washer, the plunger `having a reduced portion to provide a discharge passage.

f 11. In a liquid dispensing apparatus, the combination of a pump having a body provided with a displacement chamber, a'sourcc of supply, a connection .from said source of supply to said chamber, a :displacement plunger of less diameter than the chamber coacting with said chamber, the chamber having an inlet opening of less diameter than the plunger, a stem on the plunger which coacts with said opening to close the same during the discharge stro e, said body portion having a discharge orifice at the end of the chamber opposite from the' intake, a closure carried by the plunger for closing the discharge orifice'and means for moving the plunger and closure to close the discharge orifice. f

EARL G. WATROUS. 

